The high-speed rail authority will already start to manufacture their high-speed rail on 2011. This rail system will have the ability to carry passengers 800 miles from Sacramento to San Diego. The use of this high-speed rail system will reduce green house gas emission by 12 billion pounds per year. In addition, jobs for Californians will increase to about 450,000 jobs and will reduce dependence to foreign oil by 12.7 million barrels annually. The reason why this rail reduces gas emission is that it will use 1/3 the energy of air travel and 1/5 the energy of car travel. In addition, it will reduce car congestions on the roads, which is another contributor of green house gases.
Source: California High-Speed Rail Authority via EcoGeek